Door lock



Filed March 12, 1948 3 Sheets-Sheet 1 Oct. 7, 1952 c, CLARK 2,612,771

DOOR LOCK IN V EN TOR. Ra/p /7 a. 0/0 k o/weys R. C. CLARK Oct. 7, 1952DOOR LOCK 3 Sheets-Sheet 2 Filed March 12, 1948 Oct. 7, 1952 R. c. CLARK77 DOOR LOCK Filed March 12, 1948 3 Sheets-Sheet 3 8 (0 (0O so INVENTOR.244 6. Clark 5L BY Patented Oct. 7, 1952 ,UNiTED sT TEs A'TENT C F noonLOCK Ralph Clark, Willtiwbrook, Califgassig norto Ray E.'Cla'rk,Willowbrook, Calif. Q"

Application March 12, 1948, Serial it-14 ,419

' a cl ms. (on. 70-146) This invention relates to improvements in locks,and more particularly to an improved mortise lock for a house'door. c

It is among the objects of "the invention to provide an improved lockwhich may be mounted in a door Without the use of any screws threadedalso be locked from theinside so-that it cannot be operated from theoutside, which requires only a circular hole extendingthrough the doorand an intersecting bore extending from the edge of the door to the holefor the mounting of the lock in a door, and which is simple, durable andeconomical in construction, and neat and attractive in appearance. Otherobjects and advantages will become. apparent from a consideration of thefollowing de-' scription in conjunction with the accompanying drawings,whereinzix Figure 1 is a perspective view of the lock in longitudinalcross-section; a ,7

Figure 2 is an exploded, perspective view of the lock components inposition for assembly; Figure 3 is a longitudinal cross-section of thelock installed in a door and is taken substantially in the plane of thesection line 3-3 of Figure 1; Figure 4 is a longitudinal cross-sectionsimilar to Figure 3, but taken in a plane perpendicular to the sectionalplane of Figure 3; a Figure 5 is a transverse cross-section of th lockinstalled in a door and is taken substantially in the plane of thesection line 5-5 of Figure 1; Figures 6 and 7 are views similar toFigure 5, but showing the. latch bolt andbolt-operating spindles indifferent operative positions from that illustrated in Figure 5; v f:

Figure 8 is a transverse cross-section taken substantially in'the planeof the section line 8-8 of Figure 1; Figure 9 is a transversecross-section taken substantially in the plane of the section line 99ofFigure 1; a 1 Figure 10 is a cross-sectional view of a portion of theinner escutcheon plate showing the application thereto of-a slidable pinfor locking the inner knob of the lock; and

Yr-2f- Figure 11 is an elevation of the lock showing a modified form ofthe invention.

a, .With continued reference to the drawings, the i improved lockcomprises, in general, an outer es:

cutcheon structure i ii, a hollow lock bolt housing slidably engaged atits inner end by the. structure III, a latch bolt i2 slid'able in thehousing?! i a knob spindle 13, an outer knob i i mounted on the outerend of thespindle l3, aninner knob 15 mounted on the inner end of thespindle, an inner. escutcheon plate Iii surroundingthe spindle at theinner end of the inner'knob, screws 'll operatively connecting the innerknob and inner escutcheon plate to the. outer-escutclrieon'struc-l'v iture II], a lock tumbler barrellB, secured ina bore in the outer knob, akey cylinder is operatively mounted in the tumbler barrel, and-a keyspindle a 2D operatively engaged atone endby the key cylinder l9 andextending'through the lock bolt ii. A dead bolt pin 2'i-extendsthroughthe inner escutcheon plate 16 for operative engagement with thelatch bolt l2 to secure the lock against operation, and a locking'pin 22is slidablycarried by 1 the inner escutcheonplate it for locking theknobs and the .knob spindle l3 against'rotationr inwardly of theaperture oi -opening 25 at'the inner face of the escutcheon plateformation 24.

The segments 2! have respective grooves 29 in their inner fiat facesparallel to and adjacent corresponding edges of the segments, andscrew-.. threaded wells 30 extending inwardly of the segments from theends thereof opposite the es-y cutcheon, plate formation 24,- Thesegments 2? are disposed inwardly of the periphery of the escutcheonplate formation 24 to provide an annularshoulder 3| extending entirelyaround the inner face of the plate formation, thesegments being sospaced as to fit into a circular hole provided in a door and theshoulder 3 l being' adapted to bear against the door surface surroundingthe v I The length of segments 21 is such as to extend substantiallyhole at the outer side of the door.

through a door of the minimum thickness to which the lock is to beapplied; The'lock; however, is readily adaptable to thicker doorswithout in any way "changing the as will presently appear.

inner end oft he structure thereof,

The outer knob 14 is provided with a cylindrical axial bore 32 extendingtherethrough and surrounded at the inner side of the knob by an annularboss 33 and a semi-circular flange 34 extending inwardly of the apertureat the inner end of the boss.

The lock tumbler barrel l8 and key cylinder l9 are of conventionalconstruction and do not require a detailed description; The. tumblerbarrel I8 is secured in the bore 32 of the knob against rotationrelative to the knob and is provided with spaced-apart radial bores inwhich conventional tumblers 33 are slidably received and in which thetumblers are held by. a dovetailed plate I34 slidably received in. adovetailed groove provided inv the barrel at the outer ends of thetumbler bores. Thei'key cylinder [9 is normally held against rotation inthe barrel. 1.8 by the tumblers 33, but .may be rotated by the properkey when inserted into the cylinder in the conventional manner; Theinner end ofthe key cylinder has an apertured lug.. 35 thereonoperatively connecting the key cylinder-to the key spindle 20. r

The-knob spindle l3 comprises a semi-cylindrical'intermediate portion3'5 having a semicylindrical concavity 3! in' the flat face. thereof, asemi-cylindrical flange138 at the outerendof the portion 36 and anelongated,-square or-noncircular shank 39 extending from the inner endof the semi-cylindrical portion 36 substantially coaxially therewith.The semi-cylindrical cavity 31 terminates. in a perpendicularshouldernlil spaced from the innerface of flangel38 and asemi-cylindricalconcavity 4 l of'materially'smaller radius-thantberadius of. the concavity 31 extendsfrom the shoulder 4ll'.to theflanged outer end of the spindle.

The key spindle 29 comprises a semiecylindrical end portion 42receivable. in nesting association in'the concavity 3'! of the knob.zspindle li3,'a cylindrical intermediate 3 portion 43 which fits in thesmaller concavity 4| 'Ofthdfkl'lObSDiIldlG, and an enlarged cylindrical.end: portion. having a diameter substantially equal tothat ofthe flange38 of the lock spindle and having a noncircular recess 45 in theouterend'thereof into which the lug 35 of thekey cylinder IBrfits.

The outer escutcheon structure l0,knob-spindie l3, key spindle 2U, knobl4, tumbler barrel l8 and key cylinder l9 are operatively associated;in1the following manner to provide ayprimarysubassembly.

First, the key cylinder is. is placed in operative position in thetumbler barrel 18. :The lug35 ofv the key cylinder is then inserted intothe recess 45. in theend portion 44 of the-key spindle!!! and a lockingpinin the form of a screw 46 is inserted through a diametricalaperture-41in the socket 44 and throughthe aperture in-the key cylinderlug 35 thus positively connecting the key cylinder to the key spindle.The key spindle is then nested in the lock. spindle l3 and this entirestructure is,- inserted through the outer knob l4.from the .outerend, ofthe knob, until the flange 38 of the knob cylinder is in alignmentwiththe semi-circular flange- 34 at the inner end of the knob bore with theends of the flanges mutually opposed to holdthe knob. spindle againstrotation relative to the outer knob" [4. -It is understoodthat when thetumbler barrel 18 is inserted into the knob bore, itis secured againstrotation relative to the knobby some convenient means, such asinterfitting, non- 4 circular portions of the bore and the tumblerbarrel.

With the spindles and the tumber barrel and key cylinder held inoperative position in the outer knob, the ends of the spindlesprojecting from the inner end of the knob are now inserted through thecentral aperture 25 in the escutcheon structure I0 in an invertedposition such that the: aligned flat faces of the semi-circular portionsof the spindles pass over the shoulders of the flange 28 in theescutcheon plate formation of the lock barrel. When the outer end of the.boss. 26 of the escutcheon plate formation 24 is broughtinto contactwith the inner end of the Y knob'bossj 3.3, the semi-circular flange 28will be in alignment with a circumferential groove 48 provided in theouter surface of lock spindle 13 adjacent the inner face of flange 33.The knob and spindle assembly is now rotated through seating the flange28 in the groove 48 to secure the knob and spindle assembly againstseparation from the outer escutcheon structure ID. This sub-assembly isnow ready for the association of the latch bolt housing and latch bolttherewith;

The latch bolt housing I l is an elongated tubular' member ofrectangular cross-section having transverse grooves 50 in its normallyupper and lower outer faces providing shoulders 5| which are slidablyreceived in'the grooves 29 of the structure It). At its outer end, thehousing II is provided with an outwardly-extending flange or shoulder 52received in a recess provided in the edge of-the door surrounding theouter end of a bore 53 provided in the door to receive the latch housingII. If desired, brads or screws 54 may be inserted through suitableapertures in this shoulder and into the door to assist in holding thehousing in operative position in the bore. This housing is providedintermediate the length of opposite sides thereof with elongatedopenings 55 foraspring stop plate 56, the purpose of which will befurther described in connection with the construction of the latch bolt[2, and with an-aperture 51 for the inner end of the dead bolt pin 2 I.

The latch bolt 1 2 comprises an elongated member of rectangularcross-section having its outer end beveled at one side, as indicated at58, and having an elongated spring-receiving slot 59 intermediate thelength thereof, a spindle-receiving slot or opening :60 of substantiallysquare shap'enear" the rear end thereof, and a hole 6i to: receivethe-inner end of the dead bolt pin 2!.

'Thellatch bolt housing 'Il, latch bolt l2 and latch. bolt springconstitute a second sub-assembly provided by placing the spring in thespring-receiving slots 55 in the latch bolt, inserting thelatch'bolt inthe housing, and then inserting-the spring abutment plate 56 through thehousing openings 55 at the rear end of the springyso thatthe compressionspring 62 will besoperative" to resiliently force the latch boltoutwardly of the housing to the operative position illustrated in-Figure5.

In order toassemble the latch bolt sub-assembly with the primarysub-assembly described above," the latch bolt housing is inserted in thebore 53 'provided'therefor in the door with the shoulders at the innerend thereof positioned at the correspon'ding side of the hole 63provided in-the:door'fora'the'lock barrel I 0. With the latch" bolt' andhousing assembly in position, the outer escutcheon structure is theninserted in the hole 63 and the grooves 29 slidably receivethe shouldersto positively secure the latch bolt housing to the outer escutcheonstructure. Movement of the latch bolt l2 in the housing II is limited bya stop pin 64 extendin'gthrough an elongated slot 65 in the latch boltand having its ends secured in apertures provided in the opposite sidewalls of the latch bolt housing. I When the barrel is being inserted inthe hole 63in'the door, the latch bolt is preferably forced rearwardlyagainst the action of spring 62 so that the spindles l3 and will passfreely through the spindle-receiving slot 60 in the latch boltl Once thespindles are in operative position in the slot 60, the pin 64,restricting rearward movement of the latch bolt, will prevent the knobspindle 13 from being rotated to an extent such that it can bedisassociated from thebarrel structure Hi. a

After the primary sub-assembly, including the lock barrel, spindles andouter knob, has been operatively associated with the secondarysubassembly, including the latch bolt and latch bolt housing, the innerknob 15 and inner escutcheon plate I6 are sub-assembled and thenassociated with the primary sub-assembly. i

The inner escutcheon plate l6 comprises a fiat, circular plate structurehaving a central aperture 65 surrounded at the outer side of the plateby a boss 66, eccentric apertures 51 for the screws 17, a radial groove68 in its inner face in which the locking pin 22 is slidably mounted,and an aperture 69 for the dead bolt pin 25.

The inner knob 15 has a cylindrical shank [0 provided withangularly-spaced, radial holes H .to receive the inner end of thelocking pin 22 and with a circumferential groove 12 spaced outwardlyfrom these holes. This knob also has an elongated axial well 13 of thesame cross-sectional shape and size as the cross-sectional shape andsize of the shank 39 of the knob spindle 13. In order to assemble theinner knob 55 withfthe inner escutcheon plate i6 'the'knob shank isinserted through the central opening in the plate, a suitable thrustWasher M is placedfover the shank to bear against the inner side of theescutcheon plate, and a snap ring 15' is secured in the circumferentialgroove 12 holding the knob in operative association with the escutcheonplate.

After completing the inner knob and escutcheon plate sub-assembly, thissub-assembly is associated with the primary sub-assembly by insortingthe inner end of shank 39 in the well 13 in the inner knob and movingthe inner knob toward the outer knob until the inner escutcheon plate 12bears against the inner face of the door. The screws I! are theninserted through the corresponding holes in the inner escutcheon plateand threaded into the screw-threaded holes provided in the segments 21of the lock barrel and tightened until the door is firmly clampedbetween the inner escutcheon plate if and the outer escutcheon plateformation 24 of the lock barrel structure. The lock is now completelyas-' sembled in the door. The length of screws 11 is suflicient tocompensate for different door thicknesses.

When the lock is free, the knob spindle I3 I may be rotated by eitherthe outer or inner knob.

can be opened from the outside only by use of a key, the locking pin 22is moved inwardly by suitable means, such as the toggle lever i6, untilits inner end isengaged in one of the radial holes 1 I provided in theshank of the inner knob. With the inner knob thus locked againstrotation, the knob spindle [3 cannot be rotated and the door cannotbeopened by the outer knob, or by either knob until the locking pin iswithdrawn. If it is now desired to open the door from the outside, akeyTI is inserted in the key cylinder I9 and rotated, which operation willrotate the key spindle 20, as particularly illustrated in Figure7,moving the latch bolt l2irearwardly suf-- ficiently to release the lock.If it is desired to secure the door so that it cannot be opened with akeyfrom the-outsida'the dead bolt pin 2i is pushed inwardly so thatits-inner end engages in the corresponding hole 6| in the latch bolt inwhich case the latch bolt cannot be withdrawn by either the knobs or akey. i

i In the modified form of the invention illustrated in Figure 11-,thejinner knob I5 is omitted and a hub member issecured on the inner endof the knobspindle shank -39.' This hub structure has an arm '8lextending radially therefrom and a flexible loopor pull member 82 issecured to the outer end of the arm for rotating the spindle, 'Ifdesired,-the' hub structure'and arm may be e'nclosed'in a'bell-shapedhousing '83 having an arcuateslot'84 therein and a pin on the outerend'of theiarm may extend through the slot 84 and have the pull cord a2attached thereto outside 'of the housing.

The invention may be embodied in other specific forms withoutdepartingfrom' the spirit or essential characteristics thereof. Thepresent embodiments are'ytherefore, to be considered in all respects asillustrative and not restrictive, the scope of the invention beingindicated by the appended claims rather than by the foregoingdescription, and all changes which come within the meaning and range ofequivalency of the claims are, therefore, intended to be embracedtherein. 1

I claim:

1. A door lock comprising an outer escutcheon structure having acentrally-apertured outer escutcheon plate formation thereon, a latchbolt housing operatively connected at its inner end to said structure, alatch bolt slidable in said housing and having a spindle-receivingopening adjacent the inner end thereof, a knob spindle extending throughsaid outer escutcheon structure and said latch bolt operative uponrotation. thereof toretract said latch bolt, an outer knob and an innerknob operatively associated with said knob spindle at corresponding endsthereof, a tumbler barrel and key cylinder in said-outer knob, a keyspindle having one end connected to said key cylinder and its oppositeend extending through said latch bolt to retract the latter uponrotation of said key spindle, a formation on the outer end of said knobspindle locking said spindle and said outer knob against relativerotation, formations on said spindles maintaining said spindles, saidouter escutcheon structure and the. inner end of. said inner: knobsmeansreleasably attaching said inner escutcheon plate-to said outerescutcheon. structure, :and: locking. .means carried bysaidinnerescutcheon plateand. opera-- tively engageable with said innerknob to restrain said knobs and. said; knobspindle against rotation toretract said latch bolt.

2. In a door lock, an outer. escutcheon structure including acentrallyr-apertured escutcheon plate formation, having a semi-circularflange in the central aperture thereof, .and a pair of tongues of partlycylindrical; shape having flat inner. faces. disposed oneateachsideaotsaid-central aperture 7 and provided respectively .with screw-threadedwells inthe ends: thereof opposite said escutcheon plateformation; andhaving longitudinal grooves in; said flat ginner' facesad-j acentcorresponding edges thereon. :a hollow. latch bolt housing having,shoulders at itsinner end=slidably received in. said grooves, a.latch-rboltgslidable, in.

said housing; having initsinner-end-a spindle slotaligned withsaidcentral aperture, acentrally-apertured inner escut.cheon;-pla te-,screw fasteners threaded into said wells insaid-tongues securing saidinner escutcheon plate-to said outer escutcheon. structure, a knobspindle extending through the central apertures otfl. ;said inner. and.

outer escutcheonplates-and having-a groove thereinrotationallyinterlocking with said semi cylindrical. flange, st p.-meansacting. :between said latch bolt housing and said.latch-boltrrestraining said knob spindle against rotation 'sufficientfor dlsassociation thereof from; said outer escutcheon plate formation,an outer knob secured on the outer. end. of said knob-spindle, and aninner knob .operatively associated with the inner end of saidknobsplnclle.

3. Ina door lock, an outer. escutcheon structure including acentrallyapertured escutcheon plate formation having a semi-circular.flange. in the central aperture thereof, and-a pair of tongues of partlycylindrical shape having fiat inner. faces disposed one at each sideofsaid central aperture and provided respectively with screw-threadedwells in the ends opposite said-escutcheon plate formationandwithlongitudinal grooves in. said flat .inner .faces :adlacentcorresponding edges thereof, a hollow latch bolt housing havingshouldersat. its innerend slidably received in said gr0oves,;a.latchbolt slidable in said housing having .inits. inner end a spindle slotaligned with said central aperture, a centrally-apertured innerescutcheonplate, screw fasteners threaded into said wells insaid tonguessecuring said inner escutcheon plate to said outer escutcheon structure,aknob spindle extending through the central apertures of said inner andouter escutcheon plates and. having a groove therein rotationallyinterlocking with said semiecylindrical flange, stop means actingbetween said latch bolt housingandsaidv latch-bolt restraining said knobspindle; against rotation sufficient for disassociation; thereof. fromsaidouter escutcheon plate formation, an outer knob secured on the outerend of said knob spindle, an inner knob operativelyassociated withtheinner end of said knob spindle, saidouter knob having an axial bore and.asemi-circular flange in the inner end of said bore, and. said knobspindle having a semicircular fiange on its outer end, said knob andspindle flanges having mutually opposing ends when said spindle isoperatively associated with said, knobto restrain said knob and. saidspindle against; relative rotation.

RALPH C. CLARK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 588,673 Wyman Aug. 24, 1897812,904 Voight Feb. 20, 1906 866,583 Hope Sept. 17, 1907 1,895,414Huffman Nov. 1, 1921 2,062,598 Nilsen Dec. 1, 1936 2,479,174 LickteigAug. 16, 1949 2,510,746 Kleeberg June 6, 1950 2,525,340 Clark Oct. 10,1950 2,544,959 Hillgren Mar. 13, 1951

